Live demonstration: Depth from focus on a focal plane processor using a focus tunable liquid lens

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • External authors:
  • Julien N.P. Martel
  • Lorenz K. Muller
  • Stephen J. Carey
  • Jonathan Muller
  • Yulia Sandamirskaya


We demonstrate a 3D imaging system that produces sparse depth maps. It consists in a liquid focus-tunable lens whose focal power can be changed at high speed, placed in front of a SCAMP5 vision-chip embedding processing capabilities in each pixel. The focus-tunable lens performs focal sweeps with shallow depth of fields. These are sampled by the vision chip taking multiple images at different focus and analyzed on-chip to produce a single depth frame. The combination of the focus tunable-lens with the vision-chip, enabling near-focal plane processing, allows us to present a compact passive system that is static, monocular, real-time ( > 25FPS) and low-power ( < 1.6W).

Bibliographical metadata

Original languageEnglish
Title of host publicationProceedings - IEEE International Symposium on Circuits and Systems, ISCAS 2017
ISBN (Print)9781467368520
Publication statusPublished - May 2017

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems